Preparation method of environment-friendly surface-modified cotton fibers

A surface modification and cotton fiber technology, which is applied in fiber treatment, plant fiber, biochemical fiber treatment, etc., can solve the problems of high requirements for process equipment and various components of finishing liquid, so as to improve grafting rate, enhance surface chemical activity, The effect of high grafting efficiency

Active Publication Date: 2020-12-22
SHAOXING MAIBAO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cotton fabric modified by trimethoxybenzoyl chitosan disclosed in the invention patent CN106521950A realizes the chemical grafting of chitosan and cotton fabric through organic polycarboxylic acid and amino silicone oil emulsion as crosslinking agent, which improves the cotton fabric Antibacterial and dyeing properties, but the finishing solution has many components, requiring complex finishing processes such as padding, pre-baking and high-temperature baking, and requires high process equipment

Method used

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  • Preparation method of environment-friendly surface-modified cotton fibers
  • Preparation method of environment-friendly surface-modified cotton fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Oxidized chitosan with a viscosity average molecular weight of 100,000, a degree of deacetylation of 95%, an aldehyde content of 23.16% at C2 and C3, and a carboxyl content of 40.69% at C6 was dissolved at 60°C in dilute In the acetic acid solution, be configured into the oxidized chitosan solution that mass concentration is 1%; Cotton fiber is put into the mixture of 1-ethyl-3-methylimidazolium acetate ionic liquid and deionized water that volume ratio is 1:1 In the mixed solution, treat it at 35°C for 2 hours to obtain swollen cotton fibers, add it to the chitosan solution at a bath ratio of 1:50, stir and react at 60°C for 2 hours, take out the cotton fibers and dry them at 70°C for 3 hours , to obtain oxidized chitosan grafted cotton fibers.

[0024] (2) Add oxidized chitosan grafted cotton fiber in the solution of 0.5% amino-terminated hyperbranched polymer (weight average molecular weight is 8275), stir and react at 45°C for 10min, after the reaction finishes,...

Embodiment 2

[0026] (1) Oxidized chitosan with a viscosity average molecular weight of 80,000, a degree of deacetylation of 93%, an aldehyde content of 31.58% at C2 and C3, and a carboxyl content of 40.69% at C6 was dissolved at 60°C in dilute In the acetic acid solution, be configured into the oxidized chitosan solution that mass concentration is 2%; Cotton fiber is put into the mixture of 1-ethyl-3-methylimidazole acetate ionic liquid and deionized water that volume ratio is 1:1 In the mixed solution, treat it at 40°C for 2 hours to obtain swollen cotton fibers, add it to the chitosan solution at a bath ratio of 1:50, stir and react at 70°C for 2 hours, take out the cotton fibers and dry them at 80°C for 3 hours , to obtain oxidized chitosan grafted cotton fibers.

[0027] (2) Add oxidized chitosan grafted cotton fiber in the solution of amino-terminated hyperbranched polymer (weight average molecular weight is 8275) of mass concentration 1%, stir reaction 15min at 60 ℃, after reaction f...

Embodiment 3

[0029](1) Oxidized chitosan with a viscosity-average molecular weight of 50,000, a degree of deacetylation of 92%, an aldehyde content of 31.58% at the C2 and C3 positions, and a carboxyl content of 51.71% at the C6 position was dissolved at 60°C in dilute In the acetic acid solution, be configured into the oxidized chitosan solution that mass concentration is 2%; Cotton fiber is put into the mixture of 1-ethyl-3-methylimidazole acetate ionic liquid and deionized water that volume ratio is 1:1 In the mixed solution, treat it at 40°C for 3 hours to obtain swollen cotton fibers, add it to the chitosan solution at a bath ratio of 1:50, stir and react at 80°C for 2 hours, take out the cotton fibers and dry them at 80°C for 3 hours , to obtain oxidized chitosan grafted cotton fibers.

[0030] (2) Add oxidized chitosan grafted cotton fiber in the solution of amino-terminated hyperbranched polymer (weight average molecular weight is 8275) of mass concentration 1%, stir reaction 25min...

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Abstract

The invention discloses a preparation method of environment-friendly surface-modified cotton fibers. The environment-friendly surface-modified cotton fibers are obtained by grafting oxidized chitosanon cotton fibers in a dilute acetic acid solution and then carrying out amidation chemical reaction on carboxyl in an oxidized chitosan grafted cotton fabric and amino of an amino-terminated hyperbranched polymer. The preparation method is simple and easy to implement, does not use a chemical cross-linking agent, is environment-friendly and friendly to the human body, the prepared amino-terminatedhyperbranched polymer on the surface of the modified cotton fabric is high in grafting rate, good in washing resistance and lasting in antibiosis, a layer of positive charges can be fixed to the surfaces of cotton fibers after protonation of the amino-terminated hyperbranched polymer, dye can be actively adsorbed, inorganic salt and alkali are not used, and the dye-uptake and color fastness are high, so that the method has a wide prospect in the field of salt-free ecological dyeing.

Description

technical field [0001] The invention relates to a method for preparing environmentally friendly surface-modified cotton fibers, which belongs to the technical field of textile functional finishing and ecological dyeing. Background technique [0002] Cotton fiber is an important textile fiber material. Its products are cheap, moisture-absorbing, breathable, comfortable, biodegradable, safe and environmentally friendly, and are favored by people. However, cotton fabrics have a high shrinkage rate and are prone to wrinkling and deformation. In a humid environment, they are prone to mold and deterioration, and are corroded by bacteria, causing health problems. At the same time, the traditional dyeing of cotton fibers has the problems of low exhaustion rate and low color fixation rate. It is necessary to use a large amount of inorganic salts, alkalis and dyeing auxiliaries in the dyeing liquor to improve the dye uptake rate and color fastness of the dyes, and the dyeing process t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/03D06M13/352D06M15/19D06P1/48D06P1/642D06P1/52D06P1/38D06P3/66D06M101/06
CPCD06M15/03D06M13/352D06M15/19D06M16/00D06P1/48D06P1/6426D06P1/52D06P1/38D06P3/66D06M2101/06
Inventor 李君军许云辉谈杰
Owner SHAOXING MAIBAO TECH CO LTD
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